Emergency sign for vehicles



FIG. 1 is a front elevation view of an emergency sign for vehicles showing our new design;

FIG. 2 is a rear elevation view;

FIG. 3 is a side elevation view;

FIG. 4 is a top plan view; and,

FIG. 5 is an isometric view of an emergency sign for vehicles showing our new design. 

The ornamental design for an emergency sign for vehicles, as shown and described. 